Add automatic publishing of tagged commits

Publishes tagged commits to Github Releases/Luarocks via Travis CI. The deploy phase only exists for tags, and depends on the normal build/test phases completing successfully. Two environment variables are required to deploy:

- GITHUB_OAUTH_TOKEN: can be created via https://github.com/settings/tokens, only needs the public_repo scope (alternatively, can be set up via travis's CLI, see https://docs.travis-ci.com/user/deployment/releases/#authenticating-with-an-oauth-token)
- LUAROCKS_API_KEY: found at https://luarocks.org/settings/api-keys

Note: Committed .rockspecs changed to scm versions (using git as the source url)--versioned rockspecs (along with their .tar.gz) are generated by `.ci/make_rockspec.sh`

Addresses #275 (#275 (comment))

.ci/make_rockspec.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+version=$1
+if [ -z "$version" ]; then
+  echo "must specify a version" >&2
+  exit 1
+fi
+
+# .rockspec
+cp luv-scm-0.rockspec luv-${version}.rockspec
+cp rockspecs/luv-scm-0.rockspec rockspecs/luv-${version}.rockspec
+script="/^version/s@\"[^\"]\\+\"@\"${version}\"@"
+sed -e "${script}" -i luv-${version}.rockspec
+sed -e "${script}" -i rockspecs/luv-${version}.rockspec
+script="s@git://github.com/luvit/luv.git@https://github.com/luvit/luv/releases/download/'..version..'/luv-'..version..'.tar.gz@"
+sed -e "${script}" -i luv-${version}.rockspec
+sed -e "${script}" -i rockspecs/luv-${version}.rockspec
+
+# .tar.gz
+rm -rf luv-${version}
+mkdir -p luv-${version}/deps
+cp -r src cmake CMakeLists.txt LICENSE.txt README.md docs.md luv-${version}/
+cp -r deps/libuv deps/lua-compat-5.3 deps/*.cmake deps/lua_one.c luv-${version}/deps/
+COPYFILE_DISABLE=true tar -czvf luv-${version}.tar.gz luv-${version}
+rm -rf luv-${version}

.travis.yml

@@ -23,11 +23,11 @@ os:
 before_install:
   - git submodule update --init --recursive
   - git submodule update --recursive
+  - source .ci/setenv_lua.sh
 
 script:
   - if [ "x$PROCESS_CLEANUP_TEST" = "x" ]; then make && make test; else ./tests/test-sigchld-after-lua_close.sh; fi
   # Test rock installation
-  - source .ci/setenv_lua.sh
   - luarocks make
   - test $PWD = `lua -e "print(require'luv'.cwd())"`
   - luarocks remove luv
@@ -38,6 +38,26 @@ script:
   - luarocks make rockspecs/$(ls rockspecs) LIBUV_DIR=build
   - test $PWD = `lua -e "print(require'luv'.cwd())"`
 
+jobs:
+  include:
+    - stage: deploy
+      if: tag IS present
+      env: WITH_LUA_ENGINE=LuaJIT LUA=luajit2.1
+      script: skip
+      before_deploy:
+        - .ci/make_rockspec.sh $TRAVIS_TAG
+      deploy:
+        provider: releases
+        api_key: $GITHUB_OAUTH_TOKEN
+        file: luv-$TRAVIS_TAG.tar.gz
+        overwrite: true
+        skip_cleanup: true
+        on:
+          tags: true
+      after_deploy:
+        - luarocks install lua-cjson # required for luarocks upload
+        - luarocks upload luv-$TRAVIS_TAG.rockspec --api-key=$LUAROCKS_API_KEY --force
+
 notifications:
   email: true
   irc: "irc.freenode.org#luvit"

Makefile

@@ -52,11 +52,6 @@ reset:
 	  git checkout .
 
 publish-luarocks:
-	rm -rf luv-${LUV_TAG}
-	mkdir -p luv-${LUV_TAG}/deps
-	cp -r src cmake CMakeLists.txt LICENSE.txt README.md docs.md luv-${LUV_TAG}/
-	cp -r deps/libuv deps/lua-compat-5.3 deps/*.cmake deps/lua_one.c luv-${LUV_TAG}/deps/
-	COPYFILE_DISABLE=true tar -czvf luv-${LUV_TAG}.tar.gz luv-${LUV_TAG}
 	github-release upload --user luvit --repo luv --tag ${LUV_TAG} \
 	  --file luv-${LUV_TAG}.tar.gz --name luv-${LUV_TAG}.tar.gz
 	luarocks upload luv-${LUV_TAG}.rockspec --api-key=${LUAROCKS_TOKEN}

luv-1.22.0-1.rockspec → luv-scm-0.rockspec

@@ -1,7 +1,7 @@
 package = "luv"
-version = "1.22.0-1"
+version = "scm-0"
 source = {
-  url = 'https://github.com/luvit/luv/releases/download/'..version..'/luv-'..version..'.tar.gz'
+  url = 'git://github.com/luvit/luv.git'
 }
 
 description = {

rockspecs/luv-1.22.0-1.rockspec → rockspecs/luv-scm-0.rockspec

@@ -1,8 +1,8 @@
 -- Alternate rockspec that uses luarocks builtin builder
 package = "luv"
-version = "1.22.0-1"
+version = "scm-0"
 source = {
-  url = 'https://github.com/luvit/luv/releases/download/'..version..'/luv-'..version..'.tar.gz'
+  url = 'git://github.com/luvit/luv.git'
 }
 
 description = {